/Engine/Source/Runtime/Engine/Public/AnimationRuntime.h
Accumulates weighted AdditivePose to BasePose. Rotations are NOT normalized.
static void AccumulateLocalSpaceAdditivePose ( [FCompactPose](API\Runtime\Engine\FCompactPose) & BasePose, const [FCompactPose](API\Runtime\Engine\FCompactPose) & AdditivePose, [FBlendedCurve](API\Runtime\Engine\Animation\FBlendedCurve) & BaseCurve, const [FBlendedCurve](API\Runtime\Engine\Animation\FBlendedCurve) & AdditiveCurve, float Weight )